We've completed our 2017 promise and have not yet added new language pairs on the roadmap.

Anticipating your question, I'd like to say that all our courses are handcrafted by linguists employed by the company, so the decision to take on a new language pair is a cross-team commitment. At the moment, we are committed to bringing new features into the app. I personally would like nothing more than seeing us adding new language pairs in 2018, but there is no promise we could make just yet.